According to the Prosveta web site, Aïvanhov “was born in Bulgaria and received French citizenship just before his death. At the age of 17 he became Peter Deunov’s disciple and stayed with him until 1937. It was at this time that Peter Deunov, founder of the White Brotherhood, asked him to leave Bulgaria for France in order to spread the teaching. From 1938 until 1986 he gave some 4,500 talks in French, first of all in France (in Paris and its outskirts, and later at Fréjus in the Var region), and then in Switzerland, Canada, the United States, India, Sweden and Norway. He also visited many other countries. His talks were first recorded in shorthand, then in 1960 on audio tape, and then on videotape. Finally, in 1972 Prosveta Publications released several collections of these talks in the form of books and brochures (translated into 30 languages), CDs and DVDs with subtitles.”